DE2103036A1 - Wheelset - Google Patents

Description

DIPL.-INQ. H. STANDING MAN · »nürnbiro a KMENWKlNaTITAMB 4> «* PIPL..PHYS. DR. K. SCHWEINZER _m , _KANZlEI ^ ₂₀₅₇₂ , _{PtIVATs n4iQt}

. »^. *. - - *. u, χ τ. TEIEGRAM ADDRESS: STAND PATINT

P AT «N T A N W A LT K TElEX OMM SS

■ ACCOUNTS:

DEUTSCHE BANK AG. NORNIEIiG NO. 3411 «

<% * A *) f \ *} n DEUTSCHE BANK AG. NORNING NO. »411 * 4

L I UO UOtj POST CHECK ACCOUNT: NORNIERO «7 HI

Nuremberg, January 22nd, 1971 115A5

British Railways Board, 222, Marylebone Road,

London, N.W.l, England

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"Wheelset"

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The invention relates to wheels or wheel sets, in particular, however not exclusively for rail vehicles. A set of wheels is to be understood in this context as a pair of wheels with a Axis are firmly connected so that they rotate with the axis.

The invention is based on the object of the Naohteile in the rotatably arranged on an axle wheels or in such To avoid wheelsets and to create wheelsets that meet the requirements of practice better than the previously known ones.

This object is according to the invention essentially in overall% solves that the axis part comprises at least resin-glued fiber material which is applied to the core of an axis so that the wheel hub on the axle by outgoing from the axis and further guided glued with resin Pasermaterial are attached in such a way that the wheels and axle form a unit.

According to the invention, the wheel hubs have at least one protruding sleeve-shaped part, the approach of the fibrous Material over the sleeve-shaped parts to form a single Unity extends. ·

-2- - _e.g.

1O9032 / 11SO

In a further embodiment of the invention, each wheel hub has essentially annular sections which are coaxially connected to one another are, on, wherein according to the invention each section can have a protruding sleeve-shaped part and wherein the with Resin bonded fiber material is guided around both sleeve-shaped parts of each section.

In a modification of this, according to the invention, the wheel hubs consist at least partially of fiber material, which is on an annular Core is applied, wherein the out beyond the axle material is on the inner and outer surface of the two wheel hubs extends.

According to the invention, the axle core can also be a tube with end sections designed as bearings, which are fastened or glued to it are. The tube can be made of metal, with the end sections either welded on or welded on or in a suitable manner connected to the pipe.

According to the invention, the fibrous or fiber material consists of following ^ fibers or any suitable combination of these fibers or threads: carbon, glass, boron and asbestos fibers. However the preferred fibers are carbon fibers and / or glass fibers.

According to the invention, a wheel with a wheel hub is also created, which has an annular core on top of carbon and / or glass fibers or any suitable combination of the foregoing Fibers is or are applied.

Further features and advantages of the invention will become apparent with reference to two In the drawing illustrated embodiments explained in more detail. It shows:

109832/1150

$ 210303

Fig. 1 shows a wheel set in part as a sectional view in which fibers extend in a direction along the longitudinal axis, and

2 shows a wheel set, partly as a sectional view, in which the fibers are wound helically around the axis or are guided.

According to FIG. 1, the wheel set has wheels 1 and an axle 2, with

which the wheels 1 are firmly connected. Yy

The axis 2 is first produced in such a way that a resin-soaked or pre-impregnated tape or woven cloth 3 is applied or laid on a steel core 4, or fibers impregnated or pre-impregnated with resin on the steel core in a helical manner are wound up so that the fibers extend helically around the steel core 4. The steel core 4 is through Welding or by suitably connecting prefabricated Aehslagerabsehnitten 5 to the ends of a steel pipe 6 produced.

The winding angle can be adjusted according to special loads, namely production of a desired fiber arrangement to get voted. For example, if rigidity or flexural strength or strength is of primary importance, then the winding angle should be as steep as possible, i.e. H. run approximately parallel to the longitudinal axis of the axis.

Each wheel hub 7 is first made by placing either resin-impregnated fibers or woven cloth 8 on an annular Core 9, e.g. B. is applied by winding, which is made of plastic foam or other rigid material of light weight, is made of wood, for example. Where necessary, fibers of short length are additionally used, for example

-4-109837 / 1150

$ 210303

Bundle of woven material or cloth on the core 9 Öer wheel hub applied in order to avoid losses in the armouring as a result of the radial effect of the winding, and to ensure a uniform Ensure distribution of the reinforcement.

If the reinforcement on the Aohsenkern 4 and on the cores of the Wheel hubs 9 is sufficiently thick, the axle core 4 and the wheel hub parts are assembled and connected or glued to one another.

The desired total wall thickness of the axis, which is necessary to withstand the acting forces, is obtained by that an additional fiber reinforcement Io either in the form of pre-impregnated fibers impregnated with resin, woven cloth, or Strip is applied. This reinforcement or reinforcement is applied in the section of the axle 2 between the wheel hubs 7 and over the inner surface of each wheel hub 7 then along the edge on the circumference, then to form a rim for the wheel rim and then guided over the outer surface of the wheel hub 7 to the axle, where it is connected or fused with the surface. Both wheels 1 and the axis 2 are connected to one another in this way to form a unit. The fibers that provide additional reinforcement Io, are preferably arranged in a direction parallel to the longitudinal axis of the axis 2, so that maximum utilization of the Fiber properties is obtained.

The orientation of the fibers in the wheel hubs 4 and 9 is corresponding adapted to the special stresses to which the wheelset is exposed. For example, it may be necessary to withstand the compression forces acting on the wheel hubs 7 be to use woven material or cloth or fibers in the direction of the longitudinal axis over the annular surfaces of the cores 9 of the Winding wheel hubs.

-5-109832 / 1150

$ 210303

The strands can be either carbon fibers or glass fibers, or any combination of the above strands. An economical or inexpensive combination is given if in areas in which the stresses or loads are low, for example in the immediate vicinity of the center of the wheel hubs and the axle, glass fibers or corresponding fibers are used, but in other areas, under high tensile stress, for example in the axle and in the transition area between axle and wheel hubs, carbon fibers or other suitable Pa-. M sers of high strength and large modulus can be used. The proportion of glass and carbon fiber reinforcement is determined according to the stresses for each wheel set construction, taking due account of the forces acting, which change according to the parameters for the suspension of the various types of vehicle.

A typical containerized long lasting epoxy resin composition for the previous soaking or wetting of pastes is the following:

The resin available under the name Shell 828 (loo parts), and Epicure NMA '(j

(90 parts and BDMA 2.5 parts): this mixture remains liquid at room temperature and must be heated.

The wheel rim 11 is connected to the wheel hub 7 and secured by means of a retaining ring 12, which is on a narrow steel ring 15 is supported, in turn on the inner surface of the wheel hub 7 is attached.

The advantages of using a composite wheelset are the following:

-6- ". 109832/1150

1. Reduction of the unsuspended weight and reduction of the chassis weight in general *

2. Elimination of residual stresses that are present in the previously known wheelsets;

3. Avoidance of axle / wheel connections;

4. as a result of point 3 .: elimination of abrasion, the occurs in known steel wheelsets and is one of the reasons for the fatigue fractures in axles;

5. as a result of point j3 .: a considerable reduction the tension concentrating in the axle and at the transition from axle to wheel, so that also the possibility is reduced by fatigue defects that occur in the

known wheelsets occur as a result of the concentrating stresses.

Fig. 2 shows a wheel set with wheels 12 and an axle 13. The wheel hubs 14 are formed in such a way that two sections coaxially 15 and 16 are connected or glued together, which by means of compression molding made of carbon fibers pre-soaked with resin and / or with Resin impregnated glass fibers or other suitable impregnated fibers are made. One axis of the pre-saturated arrangement consists (in parts by weight) of Epikote resin no.828, loo parts, Epikure DM !, 7 parts, Epikure BF, 400, 3 parts, in acetone. bolt 26 for attaching brake discs 27 to the wheel hubs are also used to reinforce the (glued) connection between the two sections 15 and 16. A wheel rim 17 is connected to each of the wheel bodies 14 and secured by means of a retaining ring 18, which is supported on a thin steel ring 19 which is fixed on the inner annular surface of the wheel body. To achieve a certain elasticity and also the removal of the To facilitate the wheel rim is a (not shown) rubber-like, elastomeric layer between the wheel hub and the wheel rim

-7-109837 / 1150

2103038

intended. The two sections 15 and 16 of the wheel bodies 14 are attached to an axle core 2o.

The axle core 2o is by butt welding or by the same Gluing of prefabricated bearing parts made of steel 21 at the ends of a thin-walled steel tube 22. The desired Wall thickness ^ of the axis, which is required to absorb the forces, is obtained by resin-soaked carbon- J fibers and / or glass fibers as reinforcement or reinforcement or other suitable Paserarmierungen 25 either as a winding, woven Cloth, or as a strip or layer. This reinforcement is in the section between the two wheel hubs of the axle core and applied over the conical sleeve-shaped parts of the wheel hub to form a unit with a curved or curved transition profile carried out. In a similar way Fibers are used, specifically on the outer tubular part 25 of the wheel hubs. The pasers are in both sections connected to each other in such a way that the properties of the fibers are used to the maximum. A typical resin composition, such as Epikote 828, loo parts, Epi-, kure BF-, 400, 3 parts, or a polyester resin mixture, such as. B. ^ Crystic 199 * can be used.

- Expectations -

109837/1150

Claims (9)

Claims Il) wheelset, consisting of a pair of wheels and an axle, characterized in that the axle consists at least partially of a fiber material glued to an axle core with resin, and that the wheels are attached to the axle by means of fiber material, which over the Axle is led out and goes to each wheel hub, so that the wheels and the axle form a unit. 2. A wheel set according to claim 1, characterized in that the wheel hubs each have at least one protruding sleeve-shaped part, and that the continued fibrous material extends over the sleeve-shaped parts to form the unit. 3. A wheel set according to claim 2, characterized in that each wheel hub has essentially two annular sections which are coaxially connected to one another. 4. Wheelset according to claim 3> characterized in that each section has a protruding sleeve-shaped part, the fiber material being guided around both sleeve-shaped parts in each section. 5. A wheel set according to claim 1, characterized in that the wheel hubs consist at least partially of fiber material which is placed around an annular core, the fiber material proceeding from the axis and extending over the inner and outer annular surface of the two wheel hubs. 6. Wheel set according to one of claims 1 to 5 * characterized in that the axis of the core consists of a tube "with him lt two bonded as a bearing formed end portions. -2- 109832/1150 2103038 -A- 7. A wheel set according to claim 6, characterized in that the tube is made of metal and that the end sections are welded to the tube. 8. Wheelset according to one of the preceding claims, characterized in that the fibrous material consists of carbon, boron, glass or asbestos fibers or a combination thereof. 9. Wheel with a wheel hub, characterized by an annular core on which carbon and / or glass fibers are arranged. 109832/1150